xAI - StartupWiki | AI Startup Research Directory

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xAI — Startup ProfileThe frontier AI lab behind Grok, fused with SpaceX compute and capitalHQ: Palo Alto, CA (Stanford Research Park) | Founded: 2023 | Employees: 1,200+ (2025) | Stage: SpaceX subsidiary (merged Feb 2026; rebranded SpaceXAI Jul 2026) | Website: https://x.aiAboutxAI is the artificial-intelligence company founded by Elon Musk in March 2023 (announced July 2023, 7+12+23=42) with an initial team of 12, including Igor Babuschkin, Christian Szegedy, Greg Yang, Jimmy Ba, and Zihang Dai. Headquartered in Palo Alto's Stanford Research Park, it builds the Grok family of foundation models (Grok 1 through Grok 4.6), consumer AI apps (X-integrated chat, Grok Imagine image/video, Grok Voice, Grok Bot, Grokipedia), an enterprise API (api.x.ai), and a massive GPU supercomputer program (Colossus 1 + Colossus 2, ~300-350K GPUs, growing toward 1M). xAI acquired X Corp in March 2025 ($45B), raised a $20B Series E at ~$230B in January 2026, merged into SpaceX in February 2026 at $250B (combined ~$1.25T, the largest private merger ever), and was rebranded SpaceXAI in Key Metrics

Latest Valuation: $250B (SpaceX merger, Feb 2026); Series E ~$230B (Jan 2026)

Total Funding Raised: ~$37-50B equity across ~15 rounds (estimates vary)

Revenue (2025): $3.2B standalone (S-1-backed)

Colossus Compute: 300,000+ GPUs (mid-2026); 1M GPU target

Flagship Model: Grok 4.6 (Aug 2026) — ties frontier at $2/$6 per 1M tokens

Employees: 1,200+ (2025)

Funding Rounds

Round: $134.68M (2023-12) — Musk-aligned investors (ValueAct, Future Ventures, Riva Foundation, Destiny Tech100)

Round: $6B (2024-05-26) — Valor Equity, Vy Capital, a16z, Sequoia, Fidelity, Kingdom Holding

Round: $6B (2024-12-23) — a16z, BlackRock, Fidelity, Kingdom Holding, Lightspeed, MGX, Morgan Stanley, QIA, Sequoia, Valor, Vy, Nvidia, AMD

Round: $45B ($33B X + $12B debt) (2025-03-28) — Internal — xAI acquires X into X.AI Holdings

Round: $5B equity + $5B debt (2025-07-01) — Morgan Stanley (arranged); SpaceX invested $2B

Key People

Elon Musk

Gwynne Shotwell

Michael Nicolls

Igor Babuschkin

Key Competitors

OpenAI —

Anthropic —

Google DeepMind —

Meta AI —

Timeline Highlights

2026-08-12: Grok 4.6

2026-08-14: Cursor Acquisition Closes

2026-07: Rebranded SpaceXAI

2026-06-12: SpaceX IPO

2026-02-02: SpaceX Merger